I did not read all posts in full (I apologize if this has been addressed), but you should not have them on vitamins and electrolytes. Those should only be used when chickens have been compromised due to injury or illness. Electrolytes can cause issues if used when not needed.
If you have them on unmediated CHICK starter (you indicated "hen" starter, but I assume you meant chick, and not layer feed), you should consider adding something like "Chick 2 & 1" to their drinking water, which is an additive containing a coccidosant (sp?) and vitamins specifically for use with chicks being fed UNmedicated feed. THey sort of go hand in hand. You can get this at Twin Cities Poultry online.
Good luck!
If you have them on unmediated CHICK starter (you indicated "hen" starter, but I assume you meant chick, and not layer feed), you should consider adding something like "Chick 2 & 1" to their drinking water, which is an additive containing a coccidosant (sp?) and vitamins specifically for use with chicks being fed UNmedicated feed. THey sort of go hand in hand. You can get this at Twin Cities Poultry online.
Good luck!